Brake for sewing-machines.



Patented 0st. 2|, |902. T.v STANKEWICZ, J. YUKNIS & P. P. MAURICAS.

BRAKE FUR SEWING MACHINES.

(Application med Apr. 17, 1902.

(No Model.)

Ho., WASHINGTON D c UNITED STATES lPATENT OFFICE.

TADEUS STANKEWICZ, JOSEPH YUKNIS, AND PETER P. MAURICAS, OF CHICAGO, ILLINOIS.

BRAKE FOR SEVWAINGfIVlACHINES.

SPECIFICATION forming part Of Letters Patent NO. 711,542, dated October 21, 1902. Application iled April 17, 1902. Serial No. 103,307. (No model.)

VT0 a/ZZ whom t may con/ccm,.-

Be it known that we, TADEUS STANKEWICZ, JOSEPH YUKNIs, and PETER P. MAUEICAS, citizens of the United States, and residents of Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Brakes for Sewing-Machines, of which the following is a full, clear, and exact description.

The object of our invention is to provide simple, cheap, and effective braking mechanism for sewing-machines which can be easily applied either to a new or an old machine and which is actuated bythe pressure of the knee of the operator and requires no manipulation with the hands at all and when actuated instantly stops the action of-the machine. This we accomplish by the means hereinafter fully described andas particularly pointed out in the claims.

In the drawings, Figure l shows a front elevation of a sewing-machine having our invention applied thereto. Fig. 2 is a plan view of our invention, drawn to a larger scale and removed from'the sewing-machine, with portions of the reciprocal actuating bar broken away.- Fig. 3 is a transverse section.

taken on dotted line 3 3, Fig. 2,'looking in the direction indicated by the arrows.

In the drawings, A A represent two pairs ofi suitably-shaped plates, which are adapted tov be clamped one to one leg and the other on the other leg of a sewing-machine B by means of screws or otherwise, substantially as shown in the drawings, and thus form a support for the other parts of the invention. These plates preferably correspond in shape and are provided with suitable guide-bearings a d', in and through which a horizontal reciprocal transmission-bar C has sliding engagement. Sliding bar C is of such length that it bridges over the space between the legs of the sewing-machine and can reciprocate in its bearings without being displaced. l Near the leg nearest which the fly-wheel O is located this bar has a stationary arm F secured' thereto at such a point that when said bar is moved in the proper direction it can bear against the side of the rim of the fly-wheel Ofarthest from the contiguous leg of the machine. That edge or side of this arm contacting with the fly-wheel O is provided with a suitable integral clip b, in which a rubber shoe c is seated and secured. Projecting in the opposite direction from the boss of this arm F is a pivotal lug d, which is connected to a pi voted arm or leverE by means of a link e. This lever is fulcrnmed about its center of y length to a bracket projecting from the inner of the two clamping-plates A, and the branch thereof opposite that to which the link is connected is provided with a suitable clip for the retentionof a rubber shoef. Lever E is located on the side of the iiy-wheel O opposite arm F, and the shoe f, carried thereby, corresponds in shape "to shoe c and together therewith' is adapted when the bar C is moved toward plate A to grapple and clamp the -fly-wheel O so tightly as tol stop the same instantly.

The bar C could be reciprocated to and from plates A in any suitable manner; we prefer, however, to move said rod sov as to cause said shoes to clampV the ily-Wheel by mechanism which is actuated by a slight sidel movement of the knee of the operator, and to make the return movement thereof` automatic. This we accomplish through the medium of a horizontal rock-shaft G, which is journaled in bearings in the parallel ends of a U-shaped bracket g. The forward end of this rock-shaft has a suitable holder h secured thereto, and into the transverse socket of this holder the L-shaped shank't' of the knee-plate L adj ustably secured. The location ot` this knee-plate is such that the sewing-machine operator has but to move the knee laterally without removing the feet from the pedals of the machine to engage it. The normal position 'of said knee-plate is in a suitably-vertical plane and at right angles to its shank, and when it is engaged by the knee of the operator it causes the rock-shaft G to rock. When the knee-pressure is removed therefrom, a coil tension-spring j, wound thereon between its bearings, restores said rock-shaft and said knee-plate to theiroriginal positions. The rear end of'rock-shaft G extends through its bearings to the rear of the bar C, and the upper end of the crank J thus formed extends above the plane of the bar C and has pivotally connected thereto a link k. This link extends and is pivotally- IDO connected to an adjustable collar K, secured fast to bar C. Thus every time the kneeplate is moved and shaft G rocked the crank J, through the medium of link 7.: and collar K, reeiproeates the transmission-bar C.

It is apparent that either arm F or the arm or lever E could be dispensed with and the remaining member depended upon to furnish the brake for the fly-Wheel O of the machine. Our invention contemplates such a possibility, as Well as such changes in the construction and dimensions of the other parts ot the invention as Will permit its application, to other sewing-machines than the type illustrated in the drawings, and We W'sh to be understood as considering the same Within the scope of ourinvention, the essential features of which are the reciprocal bar for transmitting the power and the grappling or clamping arm or arms.

What We claim as new isl. Abrake forsewing-machines comprising an automatically-remirnablc reciprocal bar, an arm rigid with said bar, and a pivoted arm or lever actuated by said bar which, together with said first-mentioned arm, clamp the iiywheel of the machine when the bar moves in one direction, and release the same when the bar moves in the opposite direction.

2. A brake for sewing-machines comprising an automatically-mturnablc reciprocal bar, a knee-plate, operatively connected thereto, and arms actuated by said bar to grapple and clamp the fly-Wheel of the machine when said bar moves in one direction, and to release the same When the bar is moved in the opposite direction.

3. A brake for sewing-machines comprising a reciprocal bar, a kneeplate operatively connected thereto, an arm rigid with said bar and a pivoted arm or lever actuated by said bar which, together with said first-mentioned arm clamp the fly-Wheel of the machine when said bar moves in one direction, and release the same when the bar is moved in the opposite direction.

4. Abrake forsewing-machines comprisingr an automatically-returnable reciprocal bar, a knee-plate operatively connected thereto, an ai'm rigid with said bar and a pivoted arm or lever actuated by said bar which, together with said stationary arm clamp the ily-Wheel of the machine when said bar moves in one direction, and release the same when the bar is moved in the opposite direction.

5. Abrakeforsewing-machinescomprising a reciprocal bar, an arm rigid with said bar and carried thereby, a pivoted arm or lever, and a link connecting said rigid and pivoted arms, which latter grapple and clamp the ily- Wheel el' the machine between them when the bar moves in one direction, but release the same when the bar moves in the opposite direction.

6. A brake forseWing-machines comprising a reciprocal bar, a knee-plate operatively connected to said bar, an arm rigid With said bar and carried thereby, a pivoted armor lever, and a link connecting said rigid and pivoted arms, which latter grapple and clamp the fly-Wheel of the machine between them when the bar moves in one direction, but release the same when the bar moves in the opposite direction.

'7. A brake for sewing-machines comprising a reciprocal bar, a rock-shaft arranged transversely thereto, and operatively connected to and f-ictuating said bar, a knee-plate connected to said rock-shaft, and an arm actuated by said bar which is adapted to engage the fly-Wheel of the machine when said bar moves in one direction, but releases the same when it moves in the opposite direction.

8. Abrakeforsewing-machinescomprising a reciprocal bar, a rock-shaft arranged transversely thereto, and operatively connected to and actuating said bar, a knee-plate connected to said rock-shaft, an arm rigid with and carried by said bar, a pivoted arm or lever, and a link connecting said rigid and pivoted arms, which latter grapple and clamp the ily-wheel of the machine when said bar moves in one direction, but release the same when it moves in the opposite direction.

il. Abrake forseivirig-machinescomprising a reciprocal bar, a rock-shaft arranged transversely thereto, and operatively connected to and actuating said bar, a knee-plate connected to said rock-shaft, an arm rigid with and carried by said bar, a pivoted arm or lever, and a link connecting said rigid and pivoted arms, which latter grapple and clamp the iiy- Wheel of the machine when said bar movesin one direction, but release the same when it moves in the opposite direction.

lO. A brake for sewing-machines comprising a reciprocal bar an automatically-returnable rock-sha1." t arranged transversely thereto having a crank on one end, a link connecting said crank to said bar, a knee-plate the H -shaped shank ot' which is secured to said rock-shaft, an arm rigid with and secured to said bar, a pivoted arm or lever and a link connecting said bar and pivoted arm, as and for the purpose set forth.

TADEUS STANKEWICZ. JOSEPH YUKNIS. PETER l). MAURICAS.

Wi tnesscs:

lll. FRIEL, FRANK D. li'roMAsoN.

IIO 

